{"title":"News: Geomechanics and Tunnelling 2/2024","authors":"","doi":"10.1002/geot.202480271","DOIUrl":"https://doi.org/10.1002/geot.202480271","url":null,"abstract":"","PeriodicalId":39412,"journal":{"name":"Geomechanik und Tunnelbau","volume":"17 2","pages":"78-85"},"PeriodicalIF":0.0,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140550185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
During new Austrian tunnelling method excavation, it is necessary to carry out an analysis of the compliance of the actual surfaces with the theoretical lines prescribed in the support types for each tunnel excavation step. With our own software solutions, we created point clouds of the excavation and shotcrete of the primary tunnel support through the automated process of photogrammetric data. Together with the tunnel axis and theoretical profiles, the georeferenced and filtered point clouds were then used in the analysis of the deviation from the theoretical lines of excavation and primary support shotcrete and shotcrete thickness. The final products of the independent analysis are deviation profiles and unwrapped extrados views with numerical results and a color legend.
{"title":"Automatic tunnel point cloud creation using photogrammetry and deviation analysis of excavation and shotcrete surfaces","authors":"PhD Tilen Urbančič, MSc Jure Česnik","doi":"10.1002/geot.202300059","DOIUrl":"https://doi.org/10.1002/geot.202300059","url":null,"abstract":"<p>During new Austrian tunnelling method excavation, it is necessary to carry out an analysis of the compliance of the actual surfaces with the theoretical lines prescribed in the support types for each tunnel excavation step. With our own software solutions, we created point clouds of the excavation and shotcrete of the primary tunnel support through the automated process of photogrammetric data. Together with the tunnel axis and theoretical profiles, the georeferenced and filtered point clouds were then used in the analysis of the deviation from the theoretical lines of excavation and primary support shotcrete and shotcrete thickness. The final products of the independent analysis are deviation profiles and unwrapped extrados views with numerical results and a color legend.</p>","PeriodicalId":39412,"journal":{"name":"Geomechanik und Tunnelbau","volume":"17 2","pages":"104-111"},"PeriodicalIF":0.0,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140550049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Preloading by fill surcharge is a widespread and rather simple ground improvement method for the anticipation of settlements brought on by additional loads from new constructions. The magnitude as well as the area of surcharge is adapted to the final construction, whereas in general about 120–140 % of the final load is applied as surcharge load. Both factors have an influence on the effective depth for which soil improvement and an anticipation of settlements is possible, respectively. In case of large construction areas with significant loads, for which a greater depth effect needs to be considered, a large earth volume for surcharge is necessary. It is a cost-intensive and environmental-relevant aspect, when earth material is not available in sufficient amount and near distance of the construction site. In order to avoid this, it was investigated whether lowering the in situ groundwater level and thus increasing the effective stresses over depth could be a possible alternative. Therefore, a case study was carried out to examine these two different types of preloading techniques and their efficacy based on known subsoil conditions. Furthermore, the influence of the possible anisotropy of hydraulic conductivity in the weak soil layer on the preloading process was investigated.
{"title":"Comparison of preloading by fill surcharge and ground water lowering based on a case study","authors":"Florian Thurner, Roman Marte, Franz Tschuchnigg","doi":"10.1002/geot.202300063","DOIUrl":"https://doi.org/10.1002/geot.202300063","url":null,"abstract":"<p>Preloading by fill surcharge is a widespread and rather simple ground improvement method for the anticipation of settlements brought on by additional loads from new constructions. The magnitude as well as the area of surcharge is adapted to the final construction, whereas in general about 120–140 % of the final load is applied as surcharge load. Both factors have an influence on the effective depth for which soil improvement and an anticipation of settlements is possible, respectively. In case of large construction areas with significant loads, for which a greater depth effect needs to be considered, a large earth volume for surcharge is necessary. It is a cost-intensive and environmental-relevant aspect, when earth material is not available in sufficient amount and near distance of the construction site. In order to avoid this, it was investigated whether lowering the in situ groundwater level and thus increasing the effective stresses over depth could be a possible alternative. Therefore, a case study was carried out to examine these two different types of preloading techniques and their efficacy based on known subsoil conditions. Furthermore, the influence of the possible anisotropy of hydraulic conductivity in the weak soil layer on the preloading process was investigated.</p>","PeriodicalId":39412,"journal":{"name":"Geomechanik und Tunnelbau","volume":"17 2","pages":"126-135"},"PeriodicalIF":0.0,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140550052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Preview: Geomechanics and Tunnelling 3/2024","authors":"","doi":"10.1002/geot.202480298","DOIUrl":"https://doi.org/10.1002/geot.202480298","url":null,"abstract":"","PeriodicalId":39412,"journal":{"name":"Geomechanik und Tunnelbau","volume":"17 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/geot.202480298","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140550048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Diary of Events: Geomechanics and Tunnelling 2/2024","authors":"","doi":"10.1002/geot.202480279","DOIUrl":"https://doi.org/10.1002/geot.202480279","url":null,"abstract":"","PeriodicalId":39412,"journal":{"name":"Geomechanik und Tunnelbau","volume":"17 2","pages":"160"},"PeriodicalIF":0.0,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140550050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Product Information: Geomechanics and Tunnelling 2/2024","authors":"","doi":"10.1002/geot.202480278","DOIUrl":"https://doi.org/10.1002/geot.202480278","url":null,"abstract":"","PeriodicalId":39412,"journal":{"name":"Geomechanik und Tunnelbau","volume":"17 2","pages":"157-159"},"PeriodicalIF":0.0,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140550090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Imprint: Geomechanics and Tunnelling 2/2024","authors":"","doi":"10.1002/geot.202480297","DOIUrl":"https://doi.org/10.1002/geot.202480297","url":null,"abstract":"","PeriodicalId":39412,"journal":{"name":"Geomechanik und Tunnelbau","volume":"17 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/geot.202480297","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140550051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Geomechanics and Tunnelling – various topics\u0000 Geomechanik und Tunnelbau – freie Themen","authors":"Karl Großauer","doi":"10.1002/geot.202480231","DOIUrl":"https://doi.org/10.1002/geot.202480231","url":null,"abstract":"","PeriodicalId":39412,"journal":{"name":"Geomechanik und Tunnelbau","volume":"17 2","pages":"76"},"PeriodicalIF":0.0,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/geot.202480231","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140550184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"16 years of operation of a road tunnel in swelling rock – results of special measures\u0000 16 Jahre Betrieb eines Straßentunnels im Gipskeuper – Ergebnisse der Spezialmaßnahmen","authors":"Flavio Chiaverio, Dr. Ulrich R. Püschner","doi":"10.1002/geot.202100060","DOIUrl":"https://doi.org/10.1002/geot.202100060","url":null,"abstract":"","PeriodicalId":39412,"journal":{"name":"Geomechanik und Tunnelbau","volume":"17 2","pages":"112-125"},"PeriodicalIF":0.0,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140548286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Content: Geomechanics and Tunnelling 2/2024","authors":"","doi":"10.1002/geot.202480211","DOIUrl":"https://doi.org/10.1002/geot.202480211","url":null,"abstract":"","PeriodicalId":39412,"journal":{"name":"Geomechanik und Tunnelbau","volume":"17 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/geot.202480211","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140550092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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